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Moni Naor (Hebrew: מוני נאור‎) is an Israeli computer scientist, currently a professor at the Weizmann Institute of Science. Naor received his Ph.D. in 1989 at the University of California, Berkeley. His advisor was Manuel Blum.

Moni Naor
Moni Naor at the DIMACS Workshop on Cryptography.jpg
Moni Naor at the DIMACS Workshop on Cryptography, July 2016.
Alma materTechnion
University of California, Berkeley
AwardsGödel prize (2014)
Scientific career
FieldsComputer Science, Cryptography
InstitutionsWeizmann Institute of Science
Doctoral advisorManuel Blum
Doctoral studentsYehuda Lindell
Omer Reingold

He works in various fields of computer science, mainly the foundations of cryptography. He is notable for initiating research on public key systems secure against chosen ciphertext attack and creating non-malleable cryptography, visual cryptography (with Adi Shamir), and suggesting various methods for verifying that users of a computer system are human (leading to the notion of CAPTCHA).[1] His research on Small-bias sample space, give a general framework for combining small k-wise independent spaces with small -biased spaces to obtain -almost k-wise independent spaces of small size.[2] In 1994 he was the first, with Amos Fiat, to formally study the problem of practical broadcast encryption.[3] Along with Benny Chor, Amos Fiat, and Benny Pinkas, he made a contribution to the development of Traitor tracing, a copyright infringement detection system which works by tracing the source of leaked files rather than by direct copy protection.[4]

Honours and awardsEdit


  1. ^ "Who Made that CAPTCHA". New York Times. Retrieved January 17, 2014.
  2. ^ Joseph Naor; Moni Naor (1990). "Small-bias Probability Spaces: efficient constructions and Applications". Proceedings of the 22nd annual ACM symposium on Theory of computing, STOC 1990 (abstract): 213–223.
  3. ^ Amos Fiat; Moni Naor (1994). "Broadcast encryption". Proc. Advances in Cryptology – CRYPTO '93 (Extended abstract). Lecture Notes in Computer Science. 773: 480–491.
  4. ^ Naor, Moni; Benny Chor; Amos Fiat; Benny Pinkas (May 2000). "Tracing Traitors". Information Theory. 46 (3): 893–910.
  5. ^ "ACM Paris Kanellakis Award". ACM. Retrieved 6 June 2017.